CVE-2026-98946 Linux CVE debrief

Who should care

Defenders responsible for Linux kernel maintenance, updates, and security should assess exposure and prioritize verification of affected versions. System administrators and operators of systems utilizing the drm/vc4 component should also be aware of potential implications.

Why it matters

CVE-2026-98946 is a Linux kernel vulnerability affecting the drm/vc4 component's handling of the V3D interrupt during runtime suspend. Defenders should assess exposure, prioritize patching, and monitor system behavior to prevent potential issues.

• Verification of affected Linux kernel versions is necessary to ensure proper V3D interrupt handling.
• Patching or updating affected versions is crucial to prevent potential system instability or unexpected behavior.
• Monitoring system behavior related to the drm/vc4 component is recommended to identify potential issues.

Technical summary

The Linux kernel vulnerability (CVE-2026-98946) involves the drm/vc4 component's handling of the V3D interrupt during runtime suspend. The issue was resolved by modifying the vc4_irq_disable function to properly mask V3D interrupt sources and synchronize_irq before powering down the V3D. This change ensures that the V3D interrupt is quiesced before the power domain is turned off, preventing potential issues with unexpected behavior or system instability. Defenders should assess exposure, prioritize patching or updating affected Linux kernel versions, and monitor system behavior related to the drm/vc4 component.

Defensive priority

Defenders should assess exposure and prioritize verification of affected Linux kernel versions, focusing on systems utilizing the drm/vc4 component.

Recommended defensive actions

• Assess exposure by verifying Linux kernel versions in use, focusing on those utilizing the drm/vc4 component.
• Prioritize patching or updating affected Linux kernel versions to ensure the V3D interrupt is properly disabled during runtime suspend.
• Monitor system behavior related to the drm/vc4 component for unexpected behavior or errors.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.

Evidence notes

The CVE record and source item provide details on the vulnerability, its resolution, and affected versions. However, specific exploitation or impact details are not provided, limiting the ability to assess real-world consequences.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.